If he is already noticing you, then ramp it up. I too am not suggesting you go to any length that would make YOU feel uncomfortable but damn it, you look good and you want to show that YOU know you do.
I think the key here may be either direct conversation or action on your part. If you've followed my sitch, you know that the idea of timing is a hard one for me. I know I need to do SOMETHING (and did via the R talk) but don't know what to do and when.
It's a little more difficult in your sitch because you don't see him that much. Showing him your sexy, fun side again could do wonders for his idea that you are GAL and ready to BE the woman you ARE.
I hope he notices. Maybe if you sense him noticing, you could say something to clarify where you both stand. That is a judgment call you need to make.
If it were me, I would just go into the "date" with NO expectations other than to have a good time and just enjoy yourself. If you touch him and he pulls back, so be it, turn back to the comedy and enjoy the rest of the night. Remember, he is NOT your H so-to-speak. He is someone you are on a first or second date with. From that perspective, you should be able to understand how to do this.